Aces of Death

Published in Flying Aces, January 1938.
"What infernal power had loosed those gun-bristling Grummans upon stricken China? And who were the merciless white devils who flew them like madmen and who fought like fiends? This sinister riddle called for the unfailing skill of Richard Knight. But even that ace agent was balked. For the winged killer from whom he sought to wrest its answer leaped into the flaming inferno of his own fallen plane—gave vent in his death throes to a defiant scream of triumph."